libgssapi / python-gssapi use syslog to log events to the system journal. syslog uses the process name argv[0] from int main(int argc, char **argv). This means that the process name in the syslog is just python3 and not the script name.
int main(int argc, char **argv)
python3
IPA should set a syslog ident to make it easier to identify issues with gssapi, e.g. syslog.openlog(os.path.basename(sys.argv[0])).
syslog.openlog(os.path.basename(sys.argv[0]))